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算力军备竞赛下的暗战:AI集群扩容引爆交换芯片增量需求

算力军备竞赛下的暗战:AI集群扩容引爆交换芯片增量需求

2026年5月24日,华泰证券发布最新研报指出,随着全球AI算力军备竞赛进入“万卡级”乃至“超节点”新阶段,作为数据中心互联核心的交换芯片正迎来“二次成长”曲线。不同于以往单纯依靠流量增长的逻辑,本轮增长的核心驱动力已转向AI集群内部极致的低延时互联需求,这不仅打开了百亿级的国产替代空间,更可能重塑国产芯片厂商的竞争格局。

核心逻辑梳理

  • Scale Out(横向扩展):万卡集群推高门槛
    :当AI集群规模突破万卡级别,为了维持海量服务器间“东西向流量”的高效传输,网络系统必须向更高容量、更高速率演进。这意味着单台交换机的性能上限被推高,高端交换芯片迎来“量价齐升”的黄金窗口。
  • Scale Up(纵向扩展):超节点架构催生新赛道
    :在追赶海外顶尖算力的进程中,“超节点”架构成为破局关键。该架构通过在单节点内堆叠更多GPU并实现极致互联,大幅提升了单机柜的计算密度。由于Scale Up对机柜内互联带宽的要求远高于Scale Out,这直接催生了海量的、此前被忽视的内部交换芯片需求。
  • 国产替代进入深水区:从“可用”到“好用”
    :虽然博通、英伟达等海外巨头仍占据绝对主导地位,但国内厂商如盛科通信等已在25.6T级别实现突破。更重要的是,在Scale Up这一新兴赛道上,国产厂商与海外巨头处于同一起跑线,且国内CSP(云服务提供商)出于供应链安全考量,正主动推进国产化适配前置,为国产芯片提供了弯道超车的历史性机遇。
  • 百亿市场空间开启
    :华泰证券测算,到2028年,国产交换芯片的市场空间将达到242亿元,其中Scale Up(129亿元)与Scale Out(113亿元)并重,2026年至2028年的复合增长率(CAGR)高达96%。

A股交换芯片产业链核心标的梳理

1. 核心交换芯片设计/制造商(最直接受益)这些企业直接生产交换芯片,是算力基建最核心的硬件载体,业绩弹性最大。

股票名称
股票代码
核心受益逻辑
盛科通信
688702
A股稀缺的商用交换芯片纯正标的。公司是国内少数具备高速交换芯片量产能力的供应商,其12.8T/25.6T高端旗舰芯片已进入市场推广和逐步应用阶段,直接受益于国产算力集群对高端交换芯片的迫切需求。
华工科技
000988
具备OCS(光交叉连接)交换芯片的量产能力。公司推出了国内首款基于硅光技术的1.6T OCS交换芯片,在下一代全光网络交换领域占据核心卡位。

2. 核心交换器件与配套芯片(深度绑定)交换芯片的生产与互联离不开核心光芯片及先进制造工艺,上游环节将伴随芯片出货量的增长而受益。

股票名称
股票代码
核心受益逻辑
仕佳光子
688313
交换芯片光路互联的核心配套商。公司是全球领先的PLC光芯片及AWG(阵列波导光栅)芯片供应商,这些芯片是实现高速交换光分波/合波的核心器件,深度绑定全球交换芯片龙头。
赛微电子
300456
交换芯片核心部件的代工龙头。公司掌握MEMS(微机电系统)晶圆制造核心工艺,是全球科技巨头OCS交换芯片核心MEMS微镜的独家代工厂,处于交换芯片产业链技术壁垒最高的环节。
光迅科技
002281
具备光交换芯片及整机量产能力。公司是国内少数实现MEMS-OCS整机及光开关芯片量产的企业,构建了从光芯片、核心器件到交换整机的全链路布局。

风险提示

  1. 云厂商资本支出不及预期风险
    :交换芯片需求的根本驱动力在于AI算力投入。若全球宏观经济下行导致云厂商(如谷歌、微软、阿里等)削减资本开支,将直接导致交换机及芯片采购量下滑。
  2. 超节点方案落地进程不及预期风险
    :Scale Up市场的爆发依赖于“超节点”架构的规模化应用。若该技术路线在实际部署中遇到散热、功耗或软件适配瓶颈,可能导致对内部交换芯片的需求延迟释放。
  3. 技术迭代与竞争加剧风险
    :交换芯片行业技术壁垒极高,博通、英伟达等巨头仍在加速推出51.2T甚至102.4T产品。若国产厂商在制程工艺或架构设计上无法快速追赶,可能在高端市场竞争中处于劣势,导致毛利率下滑。
  4. 供应链安全与地缘政治风险
    :高端芯片制造依赖全球化的供应链,若关键环节(如EDA工具、晶圆代工)受到地缘政治因素干扰,可能影响国产交换芯片的产能释放与产品交付。

引文出处:财联社、华泰证券研报、同花顺投顾平台、经济观察网、慧博投研资讯、和讯股票网、新浪财经、SAHMCapital

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  1. CONNECT:[ UseTime:0.000748s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001278s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000589s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000455s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000860s ]
  6. SELECT * FROM `set` [ RunTime:0.000365s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000914s ]
  8. SELECT * FROM `article` WHERE `id` = 664190 LIMIT 1 [ RunTime:0.003095s ]
  9. UPDATE `article` SET `lasttime` = 1779649641 WHERE `id` = 664190 [ RunTime:0.005903s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000465s ]
  11. SELECT * FROM `article` WHERE `id` < 664190 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000848s ]
  12. SELECT * FROM `article` WHERE `id` > 664190 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001989s ]
  13. SELECT * FROM `article` WHERE `id` < 664190 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002580s ]
  14. SELECT * FROM `article` WHERE `id` < 664190 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.021332s ]
  15. SELECT * FROM `article` WHERE `id` < 664190 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.049689s ]
0.213163s